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Effect of core-shell particles on the dielectric properties of epoxy nanocomposites

Effect of core-shell particles on the dielectric properties of epoxy nanocomposites
Effect of core-shell particles on the dielectric properties of epoxy nanocomposites

The dielectric properties of epoxy-based nanocomposites containing core-shell nanoparticles in this case TiO/SiO and AlO 3/SiO are investigated to examine the effect of the interphase layer. Core-shell nanoparticle were synthesised and epoxy nanocomposites were prepared for characterisation by dielectric spectroscopy (0.1 Hz - 1 MHz) and the glass transition temperature measured. The results were analysed demonstrating dielectric properties which appear counter to some generally assumed hypotheses. For example: Unlike non-core-shell nanoparticles in case of Al2O3/SiO2 core-shell nanoparticles for 1 wt. % a significant drop in the real permittivity is reported. This is attributed to the hypothesised changes in the particle interphase layer. It is also reported that as the filler concentration increased the glass transition temperature reduces. As the glass transition temperature is mainly dependent on the polymer matrix it is postulated that this could be a result of interference of the core-shell nanoparticle with the mobility dynamics and changes in the free volume. The effect of interactions between the core and shell of the nanoparticle and changes in the concentration of localised energy states are also discussed in the paper.

core-shell nanoparticle, epoxy nanocomposite, glass transition, particle interphase, permittivity
0084-9162
729-732
IEEE
Chaudhary, Sunny
e9feb00c-4cc9-4935-ad3f-2ee457d0207e
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c
Vaughan, Alun
6d813b66-17f9-4864-9763-25a6d659d8a3
Chaudhary, Sunny
e9feb00c-4cc9-4935-ad3f-2ee457d0207e
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c
Vaughan, Alun
6d813b66-17f9-4864-9763-25a6d659d8a3

Chaudhary, Sunny, Andritsch, Thomas and Vaughan, Alun (2020) Effect of core-shell particles on the dielectric properties of epoxy nanocomposites. In 2019 IEEE Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2019 - Proceedings. vol. 2019-October, IEEE. pp. 729-732 . (doi:10.1109/CEIDP47102.2019.9009643).

Record type: Conference or Workshop Item (Paper)

Abstract

The dielectric properties of epoxy-based nanocomposites containing core-shell nanoparticles in this case TiO/SiO and AlO 3/SiO are investigated to examine the effect of the interphase layer. Core-shell nanoparticle were synthesised and epoxy nanocomposites were prepared for characterisation by dielectric spectroscopy (0.1 Hz - 1 MHz) and the glass transition temperature measured. The results were analysed demonstrating dielectric properties which appear counter to some generally assumed hypotheses. For example: Unlike non-core-shell nanoparticles in case of Al2O3/SiO2 core-shell nanoparticles for 1 wt. % a significant drop in the real permittivity is reported. This is attributed to the hypothesised changes in the particle interphase layer. It is also reported that as the filler concentration increased the glass transition temperature reduces. As the glass transition temperature is mainly dependent on the polymer matrix it is postulated that this could be a result of interference of the core-shell nanoparticle with the mobility dynamics and changes in the free volume. The effect of interactions between the core and shell of the nanoparticle and changes in the concentration of localised energy states are also discussed in the paper.

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Published date: 27 February 2020
Keywords: core-shell nanoparticle, epoxy nanocomposite, glass transition, particle interphase, permittivity

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Local EPrints ID: 442538
URI: http://eprints.soton.ac.uk/id/eprint/442538
ISSN: 0084-9162
PURE UUID: 26272603-dd26-4f2c-a1ea-87ad2bfd5ded
ORCID for Sunny Chaudhary: ORCID iD orcid.org/0000-0003-2664-7083
ORCID for Thomas Andritsch: ORCID iD orcid.org/0000-0002-3462-022X
ORCID for Alun Vaughan: ORCID iD orcid.org/0000-0002-0535-513X

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Date deposited: 17 Jul 2020 16:31
Last modified: 26 Nov 2021 03:17

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Contributors

Author: Sunny Chaudhary ORCID iD
Author: Thomas Andritsch ORCID iD
Author: Alun Vaughan ORCID iD

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